The invention discloses a preparation method of a
coal-based high-performance
activated carbon material for CO2 adsorption, a binary composite catalyst is doped in a
carbonization stage of an
activated carbon preparation process, so that the CO2 adsorption performance and gas
adsorption selectivity of the
activated carbon are efficiently enhanced, the binary composite catalyst is a
sodium and iron bimetallic composite catalyst, and the
carbon dioxide adsorption performance and the gas
adsorption selectivity of the activated carbon are improved. The
molar mass input ratio of
sodium to iron is 1: 0.5-1: 2, the
carbonization temperature in the activated carbon preparation process is 600-700 DEG C, and the
activation temperature is 600-950 DEG C. According to the preparation method, in the
carbonization process, the catalyst expands the pore structure of the activated carbon, the
activation energy required by the carbonization reaction is reduced, the overall carbon yield can be improved by 5%-10%, the activated
carbon product subjected to catalytic carbonization and activation has a high specific surface area and a developed pore structure, the CO2 saturation adsorption capacity is larger than or equal to 5.0 mmol / g, and the CO2 saturation adsorption capacity is larger than or equal to 4.5 mmol / g after three times of regeneration cycle or more; the preparation method of the activated carbon is simple in overall technological process, and the composite catalyst is excellent in
dispersity and catalytic activity and has a good industrial application prospect.